Water-motor.



Patented Nov. 14, 1911 2 BHEETS-SHEET 1.

WATER MOTOR;

P. TQ GOFPIBLD.

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APPLIOATION FILED JUNE 12, 1911.

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P. T. GOFFIELD.

WATER MOTOR.

APPLICATION FILED JUNE 12, 1911.

2 s'HEBTssHEBT 2.

NNN E Patented N0v.14,1911.

UNITED sTATEs PATENT oEEIoE. 'i

PETER T. corr-Inni), oF DAYTON, omo, AssIaNoR-ToY THE COEFIELD Moron WASHER company, or DAYTON, omo.;

WATER'FMOTOE.

Specification 'of letters Patent.

Application led June 12, 1811. Serial No. 632,592.

State of Ohio, have invented'certain new' and useful Improvements in Tater-hilotors;

and I do declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to whlch it appe'rtains to make and use the same, reference being had to the accompanying drawings, and to the letters and lfiguresof reference marked thereon, which form aA part of this specification.`

Thisl invention relates to cert-ain improvements in water motors, and has for its object to provide for the shifting of the valve without any attending noise such as water hammering. And further, the invention relates' to certain improvements in the ac tuator for the'valve both as to the manner of its mounting and operation as well as the manner of its engagement with the valve. And ready access to the 'valve .or interior of the motor which enables repairs to be easily made should they be required, is a further object accomplished.

The mechanical means and arrangements will be fully set forth in the following description and pointed out in the claims.

Referring to the annexed drawings, Figure 1 is a longitudinal horizontal sectional view of the motor on the line cz-a of Fig. 3; Fig. 2 is a section on the line c-c of Fig.

r 1 Fig. 3 is a vertical longitudinal sectional elevation on the line b-b of Fig. 1; Fig. 4 is a view of the valve similar to Fig. 1, showing the valve in apartially shifted position; Fig. 5 is a view of the valve; Fig. G is a partial sectional view of one of the valve bushings; and Figs. 7 and 8 are views of the actuator for initially shifting the valve in.one direction` Referring more particularly to the drawings, 1 designates the motor cylinder provided atf one end with a stuiiingbox 2 through which a piston rod 3 passes. This piston rod connects with a piston 4 and formsthe medium through which the power generated by the motor is transmitted to the machine to be driven. The said piston rod is essentially hollow as it extends from the piston, for a purpose to be presently set forth. The end of the cylinder opposite the stufiing box 2 is somewhat increased in diameter to provide a pocket 5, and extend- Patented Nov. '14, 1911-.'

ing therefrom are inlet and outlet pipes 1,3v 1 and 15 respectively,to be againmentioned.

This enlarged end-of the cylinder receives a valve housing which is held in pt'isiti'o'l'lA by a cap 7 which lforms a detachable end of the motor cylinder beyond the valve housing. The said detachable ea '.may be screwed'into the enlarged end o the' cylinder, and when thus united forms .a chamber 8 which communicates with the chamber 9 formed `in the cylinder on the otherside of the piston 4c. This communicainder, and a passage'llin the valve housing 6.. The valve housing 6 is provided with an inlet chamber l124 which communi- Cates with the inlet pipe 13, and an exhaust chamber 14 which communicates with the exhaust pipe 15. .Inclosed within Asaid housing are right and left bushings 16 which receive a. combination valve through which the inlet and exhaust are controlled. The said bushings form oppositely disposed seats 17 for the portion -of said valve which controls the inlet of' water, and said seats lie adjacent to the inlet chamber 12.

It will be seen from Fig. 6, that the seats 1,7 lie in from the ends of the bushings, 'and that the internal Vdiameter ofthe inner ends of said bushings are made large enough to receive the inlet portion 19 of the valve member. Thus the inner ends of the bushings coperate with the'valve portion 19in forming a piston valve before said valve i ortion becomes seated.- that the further movement' necessary to bring the valve 19 on either of the seats 17 It will therefore e seen 4passage 10 formed in the wall oflthe cyl'- to fully open the exhaust on one side and the inlet on the'othe'r will be accomplished by the uid pressure. At suitable points away from the valve seatV ends of the said tending-from the said. inlet'valve portion 19 are tubular members 2Q which are supported in said bushings. Those tubular parts'20 of said valve are provided with ports 21 which enablev a communication to be formed 4between the'inlet chamber 12 Vand the in'- terior of said tubular members. The outer tially shifts said valve, moving the'inlet- -a guide therefor,

in the axis of the piston 4i, and into the on the side ofthe -piston opposite chamber 9.

The outer` ends 23'of the tubular portions 20 coperate with the outer ends ofthe valve bushings 16l and constitute exhaust valves.. The outer circumference of said tubular por.

tions are reduced to provide chambers 24 around said tubular portions constituting .passages from which the exhaust iuid enters the ports 18 when `one orl the other of 'the 'exhaust valvepkortions' 23 is opened.v

The piston 4 near the end of'its stroke, moving to the left, Fig, 1, engages the adj-acent tubularportion of the valve and iniportion 19 from its seat. The other tubular end. of said valve is likewise initially shifted in the opposite direction by an actuator 26 pivoted at 27 to ay suitable part of the valve housing, such as an apertured ear 27which projects from near the periphery of said housing, the end of said actuator being suitably shaped to straddle said ear. middle portion of said actuator has an opening of suitable size to permit a pull rod 29 to pass therethrough. The free end of the said actuator carries a valve-engaging piece 25 which has a freedom of movement relatively thereto in order. that it may properly engage the end of4 the val-ve member when brought'lin 'Contact therewith, 'and Willlimpart a longitudinal movement to said valve member Without exerting any torsional strain thereon. The freedom of movement of the valve 25 is shown to some extent in Fig. 8, which depends upon a desired looseness of connection which will permit the said piece to properly engage the end of the valve member. The extreme end of the pull rod 29 which passes through the actuator, is en larged by suitable nuts 28 or otherwise.' The said pull rod 29 passes through an axial opening 30 in the valveA housing which forms and through an opening hollow portion' of the piston rod. The end of said rod lyingr Within' said tubular piston rod has a head 31which is engaged bv the piston when the latter moves a suticient distance away from thevalve.

of the piston causesl the head 28 of :raid pull rod 29 to engage the actuator 23 and carry the flexible valve piece 25 against the end of the valve and to thus unseatthe inlet port-ion 19 1n a mannei1 similar to the action 'of the piston directly on the other end of said valve. In each case the ends of the tubular portions 20 are sealed when the piston 4 or piece, 25 engages said ends.

Operation: The operation of the devieeis as follows: With the parts in the position member, looking at I The exhaust lvalve 23- is then about toA i The 1s prevented by This action shown in lFig. l, the right hand exhaust valve 23 is open and the exhaust Huid withitself against `the position in which it is shown 1n Fig. l, it

has reached a point near ligllt hand s :irc of 'piston' The piston is lilCle'fOie moving. to the left.

the end-of. its left stroke, has sealed the end of the right tubular member 20 of the valve, and is beginning to shift said valve. fhe continued movement of said piston moves the valve to the position shown in Fig. 4'. open on the lett, and the right exhaust valve is closed. lVhen in this position the inlet valve 19 is initially, closed on its left by coming in alinement with valve bushing 16. `When the 'piston has moved the valve-'tothe position shown in .F ig. 4, the supply of live fluid to the chamber .9 is shut ott', and the piston stops. As theinlet valve 19 is opened on its right, and the flow of the live fluid to the chamber 22 the piston 4 acting a's an abutment, the live water, underprcssure, will react within the righttubular member 2O and, inseeking an outlet said tubular member, will shift the valve to the left, thereby opening the'le'ttY exhaust valve 23 and allowing the live fluid to enter the chamber ,22 and .to move the piston to the right. l`When thevalve is thus completely shifted b v the live tl.uid,the inlet .valve 19 will be moved to its left seat 17 and the left exhaust valve will be completely opened. lVhen the piston 4-is moving to the right, the fluid in the chamber 9 will exhaust through the passageway 10, the .port 11, the chamber 8, 4past the left exhaust valve 2 3, leftportslS into the exhaust' chamber 14, and out tprough the exhaust passageway 15. When yhe piston 4 reaches a point near the end of its rightstroke, the said .piston will engage the enlargement 31 and will move the abutment or piece 25 in engagement with'the end of the left tubular member 20, will seal the end thereof and initially move the valve to the right. The extended movement of thevalve to the right 'is imparted by the live duid reacting on the actuator piece' 25 in the same manner as when the live fluid reacted on the piston when the valve was moved to the left.. the abutment or piece 25 has much freedom of movement, 1t

will readily seat itself on the innerend of the left.

past the end of tne end of the left tubular member 20, thereby effectually sealing the tubular member until the valve is initially shifted. The in let valve is initially closed before it is finally seated, therefore the said valve is prevented from pounding owingto the water which was trapped within the pocket formed by the recesses in front of the valve seats escaping therefrom.

It will be noted that the motor as constructed is of simple construction, and that by merely removing the cap 7 access may be had to the valve, valve bushings and actuator.

It will alsol be noted that a valve actuator "with-.a flexible sealing portion as thus con- Strilx'ctedE may be used on an oscillating type 'of meter, as well as on a reciprocating type,

as herein shown and described.

I do not herein claim a compound valve the periphery of which is annularly depressed on either side of the inlet portion of "said valve, and the ends' of which constitute exhaust valves, as such forms the subject matter of certain claims in my co-pending application, Serial Number 598,068, filed December 19, 1910.

I claim:

1. In a Water motor having a cylinder, a piston and inlet and exhaustchambers, a. compound valve member controlling the inlet and exhaust and constructed and arranged to be finally moved by the fluid pressure, and an actuator for moving said valve member, in combination with a valve flexibly mounted on said actuator and adapted to close the end of the valve member unt-i1 said valve member is in a position to be finally moved by the fluid pressure.

2. In a water motor having a cylinder, a piston, inlet and exhaust chambers, a single valve member controlling the inlet and exhaust, said valve member being constructed and arranged to be finally moved by water pressure, means for initially moving said valve member, bushings in which said valve member reciprocates, the inner diameter of said bushings being of larger diameter at their inner ends to coperate with the inlet portion of said valve member to permit the final movement of said valve member by the Water pressure, to fully open the exhaust passage for the outward flow of the water.

3. In a water motor having a cylinder, a piston and inlet and exhaust chambers, a compound valve member constructed and arranged to be finally moved by water pressure movable in one directionby the piston, in combination with a hinged valve shifter influenced by the piston to initially move the valve member in the other direction.

4. In a motor of the -type Specified, theI housing mounted at one end of said cylinder with inlet and exhaust chambers therein,

and valve seats which lie in recesses on each side of the entrance to the inlet chamber, a compound valve a part of which is movable through said recesses and adapted to engage said seats alternately in controlling the inlet, and other parts of which are ada ted to control the exhaust, a piston movab e in contact with one'end ofv said valve member 'to initially move it from one of said seats,

an actuator movable against the other end of said valve to initially move it from the other of said seats, means under the control ofthe piston adapted to give such movement to said actuator, and a flexibly mounted valve-'engaging piece carried on said actuator. l

5. In a motor of the type specified,`the

combination with a cylinder enlarged at one end, of a valve housing mounted in said enlarged end provided With inlet and exhaust chambers, and an axial opening, a. cap engaging said enlarged end of said cylinder and forming a chamber on one side of said housing, a compound valve mounted in said housing andecontrolling the' inlet and exhaust chambers,.a piston in said cylinder dividing it into two chambers vwhich receive the motive fluid and exhaust it from opposite sides respectively of the housing, said piston initially acting on one end of said valve to shift it, an l.actuator pivoted to the side of said housing Within the chamber formed by said cap, and a pull rod projected through the axes ofthe housing and piston and adapted to be engaged by said pistonl to operate said actuator, as described.

6. In a motor of the type specified, the combination with a cylinder, of a valve housing arranged at one end of said cylinder and havinginlet and exhaust chambers and an axial opening, a compound valve mounted in the valve housing on one side of the axial opening in said housing,. and controlling the inlet and exhaust, a piston on one substantially side of said housing dividing the cylinder into two chambers, and acting on one end of said valve to initially open it,a valve ac-' tuator pivoted to said housing eccentrically to its axial opening, a pull rod projected through the piston and the axial opening of the housing, and engaging said actuator to impart initial movement to said valve, said pull rod being under the control of the piston, substantially as specified.

In testimony whereof I affix my signature,

in presence of two witnesses.

` PETER T. COFFIELD.

Witnesses:

R. J. MCCARTY, MATTHEW Smnnn., 

